From 2056cad0ab7b805f0ed5629b100b50f8ea9e127e Mon Sep 17 00:00:00 2001
From: jacqueline <me@jacqueline.id.au>
Date: Thu, 12 Jan 2023 14:28:52 +1100
Subject: WIP

---
 src/audio/include/audio_element.hpp | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

(limited to 'src/audio/include/audio_element.hpp')

diff --git a/src/audio/include/audio_element.hpp b/src/audio/include/audio_element.hpp
index 590889bd..ec6d6e80 100644
--- a/src/audio/include/audio_element.hpp
+++ b/src/audio/include/audio_element.hpp
@@ -1,10 +1,11 @@
 #pragma once
 
+#include <atomic>
 #include <cstdint>
 
-#include "chunk.hpp"
 #include "freertos/FreeRTOS.h"
 
+#include "chunk.hpp"
 #include "freertos/message_buffer.h"
 #include "freertos/portmacro.h"
 #include "result.hpp"
@@ -16,6 +17,12 @@
 
 namespace audio {
 
+enum ElementState {
+  STATE_RUN,
+  STATE_PAUSE,
+  STATE_QUIT,
+};
+
 /*
  * Errors that may be returned by any of the Process* methods of an audio
  * element.
@@ -42,7 +49,8 @@ enum AudioProcessingError {
  */
 class IAudioElement {
  public:
-  IAudioElement() : input_buffer_(nullptr), output_buffer_(nullptr) {}
+  IAudioElement()
+      : input_buffer_(nullptr), output_buffer_(nullptr), state_(STATE_RUN) {}
   virtual ~IAudioElement() {}
 
   /*
@@ -71,6 +79,9 @@ class IAudioElement {
 
   auto OutputBuffer(StreamBuffer* b) -> void { output_buffer_ = b; }
 
+  auto ElementState() const -> ElementState { return state_; }
+  auto ElementState(enum ElementState e) -> void { state_ = e; }
+
   /*
    * Called when a StreamInfo message is received. Used to configure this
    * element in preperation for incoming chunks.
@@ -94,9 +105,12 @@ class IAudioElement {
    */
   virtual auto ProcessIdle() -> cpp::result<void, AudioProcessingError> = 0;
 
+  virtual auto PrepareForPause() -> void{};
+
  protected:
   StreamBuffer* input_buffer_;
   StreamBuffer* output_buffer_;
+  std::atomic<enum ElementState> state_;
 };
 
 }  // namespace audio
-- 
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